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Finding the Fourth Proportional to 30,400.59, 45,589.95 and 12,871.65

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Solution

The fourth proportional to 30,400.59, 45,589.95 and 12,871.65 is: 19,302.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,400.59 : 45,589.95 = 12,871.65 : x
  2. Step 2: Convert to fraction form
    30,400.59/45,589.95 = 12,871.65/x
  3. Step 3: Cross multiply
    30,400.59x = 45,589.95 × 12,871.65
  4. Step 4: Simplify right side
    30,400.59x = 586,817,879.92
  5. Step 5: Solve for x
    x = 586,817,879.92/30,400.59
  6. Step 6: Final answer
    x = 19,302.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.